*{
    margin:0;
    padding:0;
}
html,body{
    height:100%;
}
li{
    list-style:none;
}
a{
    text-decoration: none;
}
.icon {
    width: 1em; height: 1em;
    vertical-align: -0.15em;
    fill: currentColor;
    overflow: hidden;
 }
 .content {
    margin-bottom: 40px;
    height:100%;
    
  }